PDF malware analysis — malicious · 2a89df99b262006e

MALICIOUS

PDF

3.9 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: a885a683cca7251623dd5664f1794dbd SHA-1: da91eb8215f281e2fc09b8570ee275deee1f0597 SHA-256: 2a89df99b262006ef14f8a2efa9b8e4e2458cdd2ad0f342fad3825270c54e8a8

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF document contains embedded JavaScript and is configured with an OpenAction trigger, indicating an attempt to automatically execute code upon opening. The critical CVE-2009-4324 heuristic firing, specifically related to media.newPlayer, strongly suggests the exploitation of this vulnerability. The embedded JavaScript, though obfuscated, likely facilitates the exploit chain. The file's metadata indicates it was authored using Scribus, a legitimate application, but the malicious heuristics override this benign context.

Heuristics 6

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009.
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `89c69dfa15ed3da1baac7ba30f14e5cb81ea2567624eb0780bbea4368c53e9bc`	pdf-javascript-stream	PDF /JS object 13 at offset 0x39A	2440 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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